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Wiktionary
whitemail

n. (context business English) A tactic to resist hostile takeover, in which the target company sells discounted stock to a friendly third party vb. To persuade

Wikipedia
Whitemail

Whitemail, coined as an opposite to blackmail, has several meanings.

Usage examples of "whitemail".

So there is breaking-and-decorating, proffering-with-embarrassment (as in most retirement presentations) and whitemailing (as in threatening to reveal to his enemies a mobster's secret donations, for example, to charity).

So there is breaking-and-decorating, proffering-with-embarrassment (as in most retirement presentations) and whitemailing (as in threatening to reveal to his enemies a mobsterās secret donations, for example, to charity).